Metal cap or closure



Mar. 27, 1923.

if 1.4 Wm" 7 Attorney Patented Mar. 27, 1923.

CHARLES HAMMER, 0F HOLLIS COURT BOULEVARD, NEW YORK.-

METAL on cLosunE.

Refiled for abandoned application Serial in). 714,143, filed August a,1912. This application filed Decem be! 9, 1922. Serial K0. 605319 1. v

To all whom it may concern Be it known that I, CHARLES HAMMER, a citizenof the United States, residing at Hollis Court Boulevard, in the countyof Queens and State of New York, have invented certain new and usefulImprovements in Metal Caps or Closures, of which the following is aspecification.

This invention relatesto bottle caps or closures of the typeparticularly intended for use with a bottle or jar having a plurality ofseparated spiral threads.

,The principal object of the invention is to provide improved means atthe lower edge of the cap for engaging the separated spiral threads ofthe jaror bottle.

With the foregoing andother objects in view which will appear as thedescription proceeds,the invention resides in the combination andarrangement of parts and in the details of constructionhereinafterdescribed and claimed, it being understood that changes inthe precise embodiment of invention herein disclosed canbe made withinthe scope of what is claimed without departing from the spirit of theinvention.

In the accompanying drawings forming part of this specification Fig. 1isa side elevation, partly in vertical section, of a bottle cap orclosure constructed in accordance with the present invention; Fig. 2 isa fragmentary view inperspective, showing the manner in'which the loweredge of the cap is bent inward, and the adjacent portion of the flangeslit, to form an engaging member for the separated threads of thebottle; Fig. 3 is a vertical section through the upper end of the bottleor jar; and Fig. 4 is a bottom plan view of the cap or closure.

Like reference numerals indicate corres'ponding parts in the severalfigures of the drawings.

The reference numeral 1 indicates the upper portion of a jar or bottlewhich is formed preferably with an annular rib 2 and a plurality. ofseparated spiral threads extendin upwardly therefrom. The numeral 4 inicates the cap or closure which is formed preferably with a flat top 5and a depending annular flange '6. At its lower edge the flange 6 isrolled or curled as indicated at 7, a wire being shown therein at 8. Forthe purpose of forming inward projections adapted to engage theseparated spiral threads 3, the rolled edge 7 is bent inward at suitablepoints, as indicated at 9 in Figs. 2 and 4. Just above each bent-inportion 9, the flange 6 of the cap or closure because the small rollededge has the appearance' of a wire, and while of course a wire withinthe rolled ed e makes that edge more rigid, yet the fact is that thiswire is not essential for this purpose as the bead 7 is strong enough tostrengthen the cap and give the requisite stiffness to the in-bentportions 9 without the wire, as in my Patent,

1,160,596 of Nov. 16, 1915, filed Aug. 8,

1912, at the same time as the original ap lication for the resentimprovement, an as in my prior atents, 1,079,238 and 894,- 633, allfiled before Aug. 8, 1912, and both of which show such rolled edgeswithout said wire. i

The provision of the slits located at intervals around the cap .permitsthe curled, rolled or strengthened edge of the'cap to be readily forcedinward atsuch intervals the required distance to form lockingprojections, any desired number ofwhich may be used. It will be observedthat'bythe provision of these slits, shown located between the curlededge and theriower ends of the reinforcing corrugations: the curled edgecan be readily forced inward to form such locking projections withoutany appreciable flexure of the skirt or flange of the cap, and bysomewhat less pressure than would otherwise be required were these slitsnot present, while at the same time these inwardly extending lockingrejections constituting or forming a part oi the rolled or beaded edgemay by reason of the slitting of the meta thereabove be forced inwardlysufiicientl to take up. the necessary variation in the g ass jar and ifdesired without -materially-af fecting the contour or circular crosssection of the projection. That is to say, by slit ltd T to be used.

ting the metal just above the rolled edge at intervals, the whole ofthis rolled edge may be'forced inwardly at such slitted portions of thecap so that if desired the general shape of the projections may remainsubstantially the same as the curled edge be tween the projections,althou h if an increased locking surface, either engthwiseor crosswiseof the lug, is required, this may be readily obtained by somewhatflattening the in-pressed portions so that the projections may besomewhat flattened either horizontally orvertically if preferredaccording to the character of the lug or divided thread of theglasscontainer with which, the cap is It will furtherbe observed thatthe corrugations not only form a gripping surface but act to reinforcethe metal of the skirt or flange, not only around the same but also at'the point where the metal is slit adjacent to the inwardly pressedlocking projections.

Thus the primary object of thepre sent invention is the provision of a.n etal cap which may be made of relatively thin metal having areinforced or strengthened. edge comprising a curled, beaded, or rolledportion,a part of which may be readily inpressed to formlockingprojections for a divided thread glass contalner by a slitting of themetal of thecap flange adjacent to said in-pressed projections, thuspermitting a part of said rolled edge to be utilized at intervals toform locking projections inwardly extending toward the center of theurthermore because the slits permit the bead to be readily forced inwardto form locking projections, these locking projections may join the beadwithout any defective deforming thereof, and consequently the cap on itsoutside has less the appearance of being deformed at these points thanmight otherwise be the case, so that the cap flange has the appearanceof having its general circular contour maintained. F urthermore on I theprinciple that an arch is stronger than a flat wall, it follows thatthese hollow rounded locking projections will effectively resistdeformation on their application to the glass container, so that thepresent improved cap has not only a strengthened flange, due to thereinforcing corrugations, but a strengthened curled edge andstrengthened locking projections of general circular form, and inconsequence the cap may be made as hereinbefore stated of relativelythin sheet metal. By the provision of the slits the rolled orstrengthened edge may be forced inwardly more sharply without, ashereinbefore stated, any appreciable deformation of the flange of thecap.

In forming this improved cap a cupshaped blank is first provided and itsflan e is provided with a strengthened edge y siderable.

to form the locking projections.

forming thereon a roll, bead. or curl by some suitable means, thereby toeilminate the disadvantages of the raw edge which are con- Slits arethen formed at the required intervals in the flange just above thestrengthened .edge and the rolled edge is then forced inwardlyadjacentto these slits the formation of the rolled edge the flange maybe alsoprovided with the strengthening corrugations or these may beprovided subsequently as may be desired. The several steps of formingthe curl or roll, slits,

that the portions for slitting the flange will operate slightly inadvance of that part of the tools which project the rolled edge inwardlyto form the locking projections.

In the application of the cap to the glass container, especially when ahermetic seal is desired, a suitable liner is provided.

This improved closure is practical with any container having divided ormultiple threads adjacent to the mouth of the same, and I do not wish tobe limited to the exact details of the construction herein set'forth asthe same may be varied, and I therefore reserve the right to change theshape, size, and arrangement of the parts without departing from thespirit and scope of'my invention and the claims.

I claim as my invention: 1. A closure'for storage vessels having aflange strengthened at the edge thereof, said flangebeing cut at aplurality of point-s around the same immediately above said strengthenededge, that portion of the strengthened edge below each of said cutsbeing bent inwardly to form locking lugs. 2. A closure for storagevessels having a flange having its edge curled or beaded, said beadededge at spaced intervals being bent inward] to form a plurality of jarengaging pro ections and said flange having immedlately above each ofsaid projections a slitted portion, thereby to facilitate the formationof said projections with less pres- During sure and with lessdeformation of the flange.

3. A cap or closure for bottles and jars having a depending flangeprovided with a wire at the lower edge thereof, sail wire being formedwith a plurality of in-bent. lugs and said flange being longitudinallyslitted immediately above said in-bent lugs.

4. A cap or closure for bottles and jars comprising a flat top, adepending annular flange, the lower edge of said flange being curled'orbeaded, an endless wire housed within said curled portion of the flange,

said wire having a plurality of in-bent lugs, and said flange beinslitted longitudinally at points immediate y above each of said in-bentlugs.

5. A. metal cap for a glass container comprising a top having adepending flange, said flange having its lower edge curled or rolled,and also having immediately above said rolled edge the metal slitted ata pluralityof points around the flange, the rolled edge being bentinwardly under such slots to form inwardly extending lockingprojections, and said flange also having reinforcing corrugations abovesaid slots around the flange.

6. A metal cap for a glass container com-' prising a top having adepending flange,

v said flange having its lower edge curled or rolled, and also havingthe metal slitted immediately above said rolled edge at a plurality ofpoints around the flange, therolled edge being bent inwardly under suchslots to form inwardly extending locking projections havingsubstantially the same shape 'as the rolled edge intermediate thelocking projections, said flange also having reinforcing corrugationsabove 'said slots around the flange.

7. A closure of the class described having a top and a depending flangeprovided with a rolled edge having inwardly extending lockingprojections formed from said rolled edge by first slitting the metalthereabove at intervals around the flange, then deflecting practicallyall of the rolled edge adjacent to each slitted portion to form saidinwardly extending locking projections.

8. A closure of the class described having a top and a depending flangeprovided with a rolled edge having inwardly extending lockingprojections formed from said rolled edge by first slitting the metalthereabove at intervals around the flange, then deflecting practicallyall of the rolled edge adjacent to each slitted portion to form saidinwardly.

extending locking projections, said flange having strengthening portionsbetween the slots and the top of the cap.

9. A metal cap comprising a top and a depending skirt having a beaded orrolled edge adjacent to its lower edge, a plurality of slotted portionsabove the bead at inter- ,vals around the skirt, and inwardly extendinglocking projections formed from such bead below the slotted portions.

10. A metal cap'comprising a top and a depending skirt having a bead orrolled edge adjacent to its lower edge, a plurality of slotted portionsabove the bead at intervals around the skirt, and inwardly extendinglocking projections formed from such bead below the slotted portions insuch manner that practically all ofthe bead is'deflected adjacent tosaid slotted portions inwardly from the outer margin of the skirt.

11. A rotatable metal closure for a container having divided threads orlugs and comprising a top and a depending skirt or flange having thelower edge provlded with a beaded or rolled edge, and having atintervals around the skirt a plurality of slots, said bead having aplurality of portions thereof deflected inwardly to form containerengaging projections, each located below one of sald slots.

12. A' rotatable metal closure for a container having divided threads orlugs and comprising atop and a depending skirt or flange having'thelower edge provided with a substantially circular beaded or rolled edgeand having at intervals around the skirt a plurality of slots, said headhaving a plurality of portions thereof deflected inwardly to formcontainer engaging projections, each located below one of said slots,and each of such projections having substantially the same cross sectionas the beaded or'rolled edge between said projections.

13. A'rot-ary metal cap for glass containers comprising a topand astrengthenedor reinforced depending flange and a strengthened orreinforced lower edge, said flange having between said two strengthenedportions slots located at intervals there-around, and the strengthenedlower edge below each of said slots being inwardly pressed to form in-.wardly extending strengthened locking projections.

14. The method of making a rotatable metal cap which consists inproviding a cupshaped blankcomprisin a top and a depending flange, thensu jecting the lower edge of the flange to pressure to form a rolled orbeaded edge, then slitting the flange at intervals above such rollededge and'subjecting the rolled edge adjacent to said slotted portions topressure radially of the cap to deflect portions of said beaded edgeinwardly relatively to the major portion of the head to form containerengaging projections.

15. The method of making a "rotatable metal cap which consists'inproviding a cupshaped blank comprisin a top anda dependin flange, thensu jecting the lower edge 0% the flange to pressure to form a rolled orbeaded edge, then slitting the flange at intervals above such rollededge and subjecting the rolled edge adjacent to said slotted portions topressure radially of thecap to deflect portions of said beaded edgeinwardly relatively to the major portion of the head to form containerengaging projections, 'while maintaining said inwardly pressedprojections of substantially the same general formation as the rollededge between the said projections.

16. The method of making arotatable metal cap which consists inproviding a cup shaped blank comprising a top and a deedge inwardlyrelatively to ihe major porpending flange, then subjecting the lowertion of the bead to form container engaging edge of the flange topressure to form a projections, and by pressure providing the rolled orbeaded edge, then slit-ting the flange above said sloizted portions withrein- 5 flange at intervals above such rolled edge forcing corrugations.

and subjecting the rolled edge adjacent to Signed at 18223 4 Park RowBuilding, said slotted portions to pressure radially of N. Y. C, thisSthday of December, 1922.

the cap to deflect portions of said beaded CHARLES HAMMER.

